Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
Challis sees an increase in the average high-temperature with the arrival of May, moving from April's icy 42.4°F (5.8°C) to a cool 54.5°F (12.5°C). Challis records an average low-temperature of 33.4°F (0.8°C) throughout the month of May.Humidity
In May, the average relative humidity in Challis is 61%.Rainfall
In Challis, Idaho, in May, during 9.7 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Challis, during the entire year, the rain falls for 75.7 days and collects up to 6.38" (162mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Challis, in May, during 1.2 snowfall days, 0.31" (8mm) of snow is typically accumulated. In Challis, during the entire year, snow falls for 51.7 days and aggregates up to 18.62" (473mm) of snow.Daylight
In Challis, the average length of the day in May is 14h and 50min.On the first day of May, sunrise is at 6:25 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 9:14 pm MDT.
Sunshine
In May, the average sunshine is 11.1h.UV index
The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In May, an average UV index of 4 transforms into the following instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Challis in May?
What is the average humidity in May?
How many days does it rain in May?
How many days does it snow in May?
How many hours of daylight does Challis have in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Challis, ID
- Average high temperature in May: 54.5°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (26.1°F).
- Average low temperature in May: 33.4°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).
Average pressure in May
Challis, ID
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Challis, ID
- Average wind speed in May: 5.3mph
The windiest months (with the highest average wind speed) are June and July (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in May
Challis, ID
- Average humidity in May: 61%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in May
Challis, ID
- Average rainfall in May: 0.55"
The wettest month (with the highest rainfall) is June (1.1").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in May
Challis, ID
- Average rainfall days in May: 9.7 days
The month with the highest number of rainy days is June (10.2 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in May
Challis, ID
- Average snowfall in May: 0.31"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Challis, ID
- Average snowfall days in May: 1.2 days
The month with the highest number of snowfall days is December (10.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Challis, ID
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 11h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in May
Challis, ID
- Average sunshine days in May: 18.7 days
The month with the most sunshine days is July (24.1 days).
The months with the least sunshine days are March and April (17.2 days).
Average UV index in May
Challis, ID
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in May
Challis, ID
- Average cloud cover in May: 26
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in May
Challis, ID
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Challis, Idaho, USA
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